<template>
  <div>
    <!--面包屑导航区-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>角色管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图区域-->
    <el-card >
      <!--添加角色按钮区域-->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
    </el-card>
    <!--角色列表区域-->
    <el-table :data="rolesList" border stripe>
      <!--展开列-->
      <el-table-column type="expand">
        <template slot-scope="scope">
          <el-row :class="['dbbottom',i1 === 0 ? 'dbtop' : '','center']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
            <!--渲染一级权限-->
            <el-col :span="5">
              <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
              <i class="el-icon-caret-right"></i>
            </el-col>
            <!--渲染二三级权限-->
            <el-col :span="19">
              <el-row :class="[i2 === 0 ? '': 'dbtop','center']" v-for="(item2,i2) in item1.children" :key="item2.id">
                <!--渲染二级级权限-->
                <el-col :span="6">
                  <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item1.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <el-col :span="18">
                  <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}} </el-tag>
                </el-col>
              </el-row>
            </el-col>
          </el-row>
        </template>
      </el-table-column>
      <!--索引列-->
      <el-table-column type="index"></el-table-column>
      <el-table-column label="角色名称" prop="roleName"></el-table-column>
      <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
      <el-table-column label="操作" width="300px">
        <template slot-scope="scope">
          <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
          <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
          <el-button size="mini" type="success" icon="el-icon-setting" @click="showRolesDialog(scope.row)">分配权限</el-button>
        </template>
      </el-table-column>
    </el-table>
    <!--分配权限对话框-->
    <el-dialog
      title="分配权限"
      :visible.sync="setRoleDialogVisible"
      width="50%" @close="setRoleDialogVisibleClosed"
     >
      <!--树形控件-->
      <el-tree :data="rightsList" :props="treeProps" node-key="id" show-checkbox default-expand-all
               :default-checked-keys="defkeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
    <el-button @click="setRoleDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      rolesList: [],
      setRoleDialogVisible: false,
      // 权限列表数据
      rightsList: [],
      // 树形控件树形绑定对象
      treeProps: {
        children: 'children',
        label: 'authName'
      },
      // 默认选中的树形控件对象
      defkeys: [],
      // 选中的角色id
      roleId: ''
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色列表
    async getRolesList() {
      const { data: res } = await this.$https.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolesList = res.data
    },
    // 根据ID删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该权限，是否继续', '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      if (confirmResult !== 'confirm') {
        console.log(confirmResult)
        return this.$message.info('取消了删除')
      }
      const { data: res } = await this.$https.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      this.$message.success('删除权限成功')
      role.children = res.data
    },
    // 查询树形菜单权限
    async showRolesDialog(role) {
      this.roleId = role.id
      const { data: res } = await this.$https.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限列表失败')
      }
      this.rightsList = res.data
      // 获取拥有的权限
      this.getDefKeys(role, this.defkeys)
      this.setRoleDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的ID 并保存到defkeys数组中
    getDefKeys(node, arr) {
      // 如果当前节点不包含children 属性 则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item =>
        this.getDefKeys(item, arr))
    },
    setRoleDialogVisibleClosed() {
      this.defkeys = []
    },
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      console.log(keys)
      const idStr = keys.join(',')
      const { data: res } = await this.$https.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRoleDialogVisible = false
    }

  }
}
</script>

<style scoped>
.el-tag{
  margin:7px;
}
.dbtop{
  border-top:1px solid #eee;
}
.dbbottom{
  border-bottom:1px solid #eee;
}
  .center{
    display: flex;
    align-items: center;
  }
</style>
